631377007 has 2 divisors, whose sum is σ = 631377008. Its totient is φ = 631377006.

The previous prime is 631376983. The next prime is 631377017. The reversal of 631377007 is 700773136.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631377007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631377017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315688503 + 315688504.

It is an arithmetic number, because the mean of its divisors is an integer number (315688504).

Almost surely, 2^631377007 is an apocalyptic number.

631377007 is a deficient number, since it is larger than the sum of its proper divisors (1).

631377007 is an equidigital number, since it uses as much as digits as its factorization.

631377007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18522, while the sum is 34.

The square root of 631377007 is about 25127.2164594489. The cubic root of 631377007 is about 857.8860134235.

The spelling of 631377007 in words is "six hundred thirty-one million, three hundred seventy-seven thousand, seven".